Territory



(No Model.)

J. MALQUIST. FORGE TUYERE.

Patented July 30, 1889.,

uth 222 I c UNITED STATES PATENT OFFICE.

JOHN MALQUIST, OF SALT LAKE CITY, UTAH TERRITORY.

FORGE-TUYERE.

SPECIFICATION forming part of Letters Patent No. 408,120, dated July 30, 1889.

Application filed March 12, 1888. Serial No. 266,992. (No model.)

To all whom it may concern.-

Be it known that I, JOHN MALQUIST, a citizen of the United States, and a resident of Salt Lake City, in the county of Salt Lake, and Territory of Utah, have invented certain newand useful Improvements in Tuyeres, of which the following is a specification.

The object of my invention is to provide an improved tuyere for a blacksmiths forge, whereby fuel will be saved and a large range obtained between the maximum and minimum blast,while the adjustment of the blast-opening is cheaply and easily effected and safety provided against damage by overpressure and clogging prevented.

The invention will be hereinafter fully described and specifically claimed, reference be ing had to the accompanying; drawings, in which- Figure 1 represents a vertical central section through the tuyere and the blast-pipe leading thereto, the section being taken on the line 00 a: of Fig. 2, and seen in the direction of arrow 1. Fig. 2 is a vertical section taken through the line y y of Fig. l, and seen in dircction of arrow 2. Fig. is ahorizontal section on the line 2 z of Fig. 2, showing in top View the adjustable airvalve. Fig. 4 is a detail view seen in direction of arrow 1 of the bracket to which the operating-levers are attached. Fig. 5 is a detail section, and Fig. 6 an under side view, respectively, of modifications of the adjustable air-valve.

Like letters of reference indicate like parts in the several figures.

The line r o indicates the upper surface of the forge.

A is the nozzle-plate, which may be a solid casting, but is preferably provided with a circular water way or channel a around the conical nozzle or opening a, through which channel water for cooling the plate is caused to flow or circulate by means of the inlet and outlet pipes b b, the latter pipe discharging into a water tank or barrel B, as usual.

To the under side of the plate A, and surrounding the nozzle a, is fastened, by bolts through lugs c, a vertical tube 0, which I will here call the body of the tuyere, and which is provided with the blast inlet-pipe c. The lower end of the tube or body 0 is normally closed by a bottom valve D, secured to a lever (Z, which latter is fu'lcrumed between lugs to a bracket E, secured to the outside of the body A. Above the bracket E the body A is provided with two diametrically-opposite lugs e 6, one of which (e in Fig. 2) serving for attaching thereto a side brace 2' for fastening to a lateral support, while the other 6 serves as a fixed point for hinging or pivoting thereto one end of the arm or link H.

The free end of the valve-lever d is pro vided with a sliding weight d, securable in position by means of a set-screw (1 so as to adjust its distance from the fulcrum and thereby the pressure or force with which the bottom valve 1) is held closed. This valve thus acts as a safety-valve to open and let out surplus of accumulated gas before the pressure in the'blower or bellows becomes so great as to burst the latter.

F is a circular air-valve fitted to slide be tween vertical guides I in the conical nozzle to, controlling the valve in such a manner that its periphery at any diametrically-opposite points and at any height is equidistant from the inner periphery of the nozzle a, thus forming an annular space of uniform width, which by raising the valve becomes gradually smalle'r until the valve, when its upper surface is about flush with the upper surface of the nozzle-plate A, completely closes the nozzle-opening, thus allowing a wide range in the modification of the blast. These guides are vertical parallel ways in and connected with the conical nozzle suitably for so centering the valve in its entire range.

In order to give a moderate constant blast, the valve F is provided with one or more apertures f, which may be either one central tapering hole, as in Fig. 5, or several grateopenings, as in Figs. 1 and 6, but, preferably, two crescent-shaped openings, as in Figs. 2 and 3, which latter construction approaches more closely the annular blast-openin g. The valve F is fixed to the upper end of a rod f, arranged within the hollowbody C, and whose lower end runs through a slot in the bottom valve 1), and below the latter is pivoted to a lever Gr, fulcrumed between two of the lugs of the bracket E by the same bolt or pintle on which the lever cl is fulcrumed. As seen in Fig. 4, the bracket E has three lugs, the middle lug serving in place of a Washer to separate the levers d and G, in order that the movement of one of them shall not by friction interfere with or cause any movement of the other.

The arm H which, as before stated, is movably attached to the lug c, has secured to its outer or free end athreaded pin,which passes through a slot g in the outer end of the lever G, and is provided with a thumb-screw h, by tightening which the lever G and arm H may be clamped together, thereby retaining the valve F firmly at the desired point of elevation in the nozzle a. By depressing the lever G, causing the threaded pin to slide in ward in the slot g, and then tightening the thumb-screw h, the valve F is raised andheld to decrease the size of the annular nozzlespace, and by raising the lever G the valve is lowered and the annular nozzle-space is increased, thus effecting and controlling the adjustment of the blast-opening.

If so desired for convenience of manipulation, the bracket E, with levers fulcrumed thereto, may be shifted from the right side of the body 0 (see Fig. 2) to the left, in which case the arm H is pivoted to the lug e and the brace t'is attached to the lug c.

From the construction of the valve-openings and the body C it is evident that no slag or ashes can clog the blast, as they simply fall down upon the bottom valve D, and are readily discharged by simply raising the lever cl to open the said valve. Any accumulated gases will open and escape through the same valve.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. The combination,with the conical tuyerenozzle, of the perforated circular sliding valve and the valve-guides controlling the sliding valve, substantially as described.

2., The combination, with a conical tuyerenozzle, of a circular valve having outward tapering aperture and guided to slide centrally within the said nozzle and adapted to close the outer end thereof, for the purpose set forth.

3. The combination, with a conical tuyerenozzle, of a circular valve having two diametrically-opposite crescent-shaped apertures, and guided to slide centrally within the said nozzle and adapted to close the outer end thereof, forthe purpose set forth.

4. The co1nbination,with atuyere-platehaving conical nozzle and a downwardly-projecting hollow body attached to said plate, of a circular valve guided to slide centrally in the said nozzle, a lever G, fulcrumed to the said body and pivoted to the valve-rod, and an arm pivoted to the said body, the free ends of the said arm and lever being adjustably secured together to vary and maintain the elevation of the said valve, substantially as specified,

5. The combination,with a tuyere-platehaving conical nozzle and a downwardly-projecting hollow body attached to said plate, of a circular valve guided to slide centrally in the said nozzle, a lever fulcrum ed to the said body and pivoted to the valve-rod, and an arm pivoted to the said body, the free ends of the said arm and lever being provided with thumbscrew and slot to adj ustably secure them together for varying and maintaining the ele vation of the said valve.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 21st day of February, 1888.

' JOHN MALQUIST.

Witnesses:

ALEX. L. .GEMMIL, B. A. M. FROIsETH. 

